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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Panasonic HotKey and LCD brightness control driver
4 * (C) 2004 Hiroshi Miura <miura@da-cha.org>
5 * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
6 * (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp>
7 * (C) 2004 David Bronaugh <dbronaugh>
8 * (C) 2006-2008 Harald Welte <laforge@gnumonks.org>
9 *
10 * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
11 *
12 *---------------------------------------------------------------------------
13 *
14 * ChangeLog:
15 * Aug.18, 2020 Kenneth Chan <kenneth.t.chan@gmail.com>
16 * -v0.98 add platform devices for firmware brightness registers
17 * add support for battery charging threshold (eco mode)
18 * resolve hotkey double trigger
19 * add write support to mute
20 * fix sticky_key init bug
21 * fix naming of platform files for consistency with other
22 * modules
23 * split MODULE_AUTHOR() by one author per macro call
24 * replace ACPI prints with pr_*() macros
25 * -v0.97 add support for cdpower hardware switch
26 * -v0.96 merge Lucina's enhancement
27 * Jan.13, 2009 Martin Lucina <mato@kotelna.sk>
28 * - add support for optical driver power in
29 * Y and W series
30 *
31 * Sep.23, 2008 Harald Welte <laforge@gnumonks.org>
32 * -v0.95 rename driver from drivers/acpi/pcc_acpi.c to
33 * drivers/misc/panasonic-laptop.c
34 *
35 * Jul.04, 2008 Harald Welte <laforge@gnumonks.org>
36 * -v0.94 replace /proc interface with device attributes
37 * support {set,get}keycode on th input device
38 *
39 * Jun.27, 2008 Harald Welte <laforge@gnumonks.org>
40 * -v0.92 merge with 2.6.26-rc6 input API changes
41 * remove broken <= 2.6.15 kernel support
42 * resolve all compiler warnings
43 * various coding style fixes (checkpatch.pl)
44 * add support for backlight api
45 * major code restructuring
46 *
47 * Dac.28, 2007 Harald Welte <laforge@gnumonks.org>
48 * -v0.91 merge with 2.6.24-rc6 ACPI changes
49 *
50 * Nov.04, 2006 Hiroshi Miura <miura@da-cha.org>
51 * -v0.9 remove warning about section reference.
52 * remove acpi_os_free
53 * add /proc/acpi/pcc/brightness interface for HAL access
54 * merge dbronaugh's enhancement
55 * Aug.17, 2004 David Bronaugh (dbronaugh)
56 * - Added screen brightness setting interface
57 * Thanks to FreeBSD crew (acpi_panasonic.c)
58 * for the ideas I needed to accomplish it
59 *
60 * May.29, 2006 Hiroshi Miura <miura@da-cha.org>
61 * -v0.8.4 follow to change keyinput structure
62 * thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>,
63 * Jacob Bower <jacob.bower@ic.ac.uk> and
64 * Hiroshi Yokota for providing solutions.
65 *
66 * Oct.02, 2004 Hiroshi Miura <miura@da-cha.org>
67 * -v0.8.2 merge code of YOKOTA Hiroshi
68 * <yokota@netlab.is.tsukuba.ac.jp>.
69 * Add sticky key mode interface.
70 * Refactoring acpi_pcc_generate_keyinput().
71 *
72 * Sep.15, 2004 Hiroshi Miura <miura@da-cha.org>
73 * -v0.8 Generate key input event on input subsystem.
74 * This is based on yet another driver written by
75 * Ryuta Nakanishi.
76 *
77 * Sep.10, 2004 Hiroshi Miura <miura@da-cha.org>
78 * -v0.7 Change proc interface functions using seq_file
79 * facility as same as other ACPI drivers.
80 *
81 * Aug.28, 2004 Hiroshi Miura <miura@da-cha.org>
82 * -v0.6.4 Fix a silly error with status checking
83 *
84 * Aug.25, 2004 Hiroshi Miura <miura@da-cha.org>
85 * -v0.6.3 replace read_acpi_int by standard function
86 * acpi_evaluate_integer
87 * some clean up and make smart copyright notice.
88 * fix return value of pcc_acpi_get_key()
89 * fix checking return value of acpi_bus_register_driver()
90 *
91 * Aug.22, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
92 * -v0.6.2 Add check on ACPI data (num_sifr)
93 * Coding style cleanups, better error messages/handling
94 * Fixed an off-by-one error in memory allocation
95 *
96 * Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
97 * -v0.6.1 Fix a silly error with status checking
98 *
99 * Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
100 * - v0.6 Correct brightness controls to reflect reality
101 * based on information gleaned by Hiroshi Miura
102 * and discussions with Hiroshi Miura
103 *
104 * Aug.10, 2004 Hiroshi Miura <miura@da-cha.org>
105 * - v0.5 support LCD brightness control
106 * based on the disclosed information by MEI.
107 *
108 * Jul.25, 2004 Hiroshi Miura <miura@da-cha.org>
109 * - v0.4 first post version
110 * add function to retrive SIFR
111 *
112 * Jul.24, 2004 Hiroshi Miura <miura@da-cha.org>
113 * - v0.3 get proper status of hotkey
114 *
115 * Jul.22, 2004 Hiroshi Miura <miura@da-cha.org>
116 * - v0.2 add HotKey handler
117 *
118 * Jul.17, 2004 Hiroshi Miura <miura@da-cha.org>
119 * - v0.1 start from toshiba_acpi driver written by John Belmonte
120 */
121
122#include <linux/acpi.h>
123#include <linux/backlight.h>
124#include <linux/ctype.h>
125#include <linux/i8042.h>
126#include <linux/init.h>
127#include <linux/input.h>
128#include <linux/input/sparse-keymap.h>
129#include <linux/kernel.h>
130#include <linux/module.h>
131#include <linux/platform_device.h>
132#include <linux/seq_file.h>
133#include <linux/serio.h>
134#include <linux/slab.h>
135#include <linux/types.h>
136#include <linux/uaccess.h>
137#include <acpi/video.h>
138
139MODULE_AUTHOR("Hiroshi Miura <miura@da-cha.org>");
140MODULE_AUTHOR("David Bronaugh <dbronaugh@linuxboxen.org>");
141MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
142MODULE_AUTHOR("Martin Lucina <mato@kotelna.sk>");
143MODULE_AUTHOR("Kenneth Chan <kenneth.t.chan@gmail.com>");
144MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
145MODULE_LICENSE("GPL");
146
147#define LOGPREFIX "pcc_acpi: "
148
149/* Define ACPI PATHs */
150/* Lets note hotkeys */
151#define METHOD_HKEY_QUERY "HINF"
152#define METHOD_HKEY_SQTY "SQTY"
153#define METHOD_HKEY_SINF "SINF"
154#define METHOD_HKEY_SSET "SSET"
155#define METHOD_ECWR "\\_SB.ECWR"
156#define HKEY_NOTIFY 0x80
157#define ECO_MODE_OFF 0x00
158#define ECO_MODE_ON 0x80
159
160#define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support"
161#define ACPI_PCC_DEVICE_NAME "Hotkey"
162#define ACPI_PCC_CLASS "pcc"
163
164#define ACPI_PCC_INPUT_PHYS "panasonic/hkey0"
165
166/* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
167 ECO_MODEs: 0x03 = off, 0x83 = on
168*/
169enum SINF_BITS { SINF_NUM_BATTERIES = 0,
170 SINF_LCD_TYPE,
171 SINF_AC_MAX_BRIGHT,
172 SINF_AC_MIN_BRIGHT,
173 SINF_AC_CUR_BRIGHT,
174 SINF_DC_MAX_BRIGHT,
175 SINF_DC_MIN_BRIGHT,
176 SINF_DC_CUR_BRIGHT,
177 SINF_MUTE,
178 SINF_RESERVED,
179 SINF_ECO_MODE = 0x0A,
180 SINF_CUR_BRIGHT = 0x0D,
181 SINF_STICKY_KEY = 0x80,
182 };
183/* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
184
185static int acpi_pcc_hotkey_add(struct acpi_device *device);
186static void acpi_pcc_hotkey_remove(struct acpi_device *device);
187static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);
188
189static const struct acpi_device_id pcc_device_ids[] = {
190 { "MAT0012", 0},
191 { "MAT0013", 0},
192 { "MAT0018", 0},
193 { "MAT0019", 0},
194 { "", 0},
195};
196MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
197
198#ifdef CONFIG_PM_SLEEP
199static int acpi_pcc_hotkey_resume(struct device *dev);
200#endif
201static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
202
203static struct acpi_driver acpi_pcc_driver = {
204 .name = ACPI_PCC_DRIVER_NAME,
205 .class = ACPI_PCC_CLASS,
206 .ids = pcc_device_ids,
207 .ops = {
208 .add = acpi_pcc_hotkey_add,
209 .remove = acpi_pcc_hotkey_remove,
210 .notify = acpi_pcc_hotkey_notify,
211 },
212 .drv.pm = &acpi_pcc_hotkey_pm,
213};
214
215static const struct key_entry panasonic_keymap[] = {
216 { KE_KEY, 0, { KEY_RESERVED } },
217 { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
218 { KE_KEY, 2, { KEY_BRIGHTNESSUP } },
219 { KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
220 { KE_KEY, 4, { KEY_MUTE } },
221 { KE_KEY, 5, { KEY_VOLUMEDOWN } },
222 { KE_KEY, 6, { KEY_VOLUMEUP } },
223 { KE_KEY, 7, { KEY_SLEEP } },
224 { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
225 { KE_KEY, 9, { KEY_BATTERY } },
226 { KE_KEY, 10, { KEY_SUSPEND } },
227 { KE_END, 0 }
228};
229
230struct pcc_acpi {
231 acpi_handle handle;
232 unsigned long num_sifr;
233 int sticky_key;
234 int eco_mode;
235 int mute;
236 int ac_brightness;
237 int dc_brightness;
238 int current_brightness;
239 u32 *sinf;
240 struct acpi_device *device;
241 struct input_dev *input_dev;
242 struct backlight_device *backlight;
243 struct platform_device *platform;
244};
245
246/*
247 * On some Panasonic models the volume up / down / mute keys send duplicate
248 * keypress events over the PS/2 kbd interface, filter these out.
249 */
250static bool panasonic_i8042_filter(unsigned char data, unsigned char str,
251 struct serio *port)
252{
253 static bool extended;
254
255 if (str & I8042_STR_AUXDATA)
256 return false;
257
258 if (data == 0xe0) {
259 extended = true;
260 return true;
261 } else if (extended) {
262 extended = false;
263
264 switch (data & 0x7f) {
265 case 0x20: /* e0 20 / e0 a0, Volume Mute press / release */
266 case 0x2e: /* e0 2e / e0 ae, Volume Down press / release */
267 case 0x30: /* e0 30 / e0 b0, Volume Up press / release */
268 return true;
269 default:
270 /*
271 * Report the previously filtered e0 before continuing
272 * with the next non-filtered byte.
273 */
274 serio_interrupt(port, 0xe0, 0);
275 return false;
276 }
277 }
278
279 return false;
280}
281
282/* method access functions */
283static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
284{
285 union acpi_object in_objs[] = {
286 { .integer.type = ACPI_TYPE_INTEGER,
287 .integer.value = func, },
288 { .integer.type = ACPI_TYPE_INTEGER,
289 .integer.value = val, },
290 };
291 struct acpi_object_list params = {
292 .count = ARRAY_SIZE(in_objs),
293 .pointer = in_objs,
294 };
295 acpi_status status = AE_OK;
296
297 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
298 ¶ms, NULL);
299
300 return (status == AE_OK) ? 0 : -EIO;
301}
302
303static inline int acpi_pcc_get_sqty(struct acpi_device *device)
304{
305 unsigned long long s;
306 acpi_status status;
307
308 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
309 NULL, &s);
310 if (ACPI_SUCCESS(status))
311 return s;
312 else {
313 pr_err("evaluation error HKEY.SQTY\n");
314 return -EINVAL;
315 }
316}
317
318static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
319{
320 acpi_status status;
321 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
322 union acpi_object *hkey = NULL;
323 int i;
324
325 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
326 &buffer);
327 if (ACPI_FAILURE(status)) {
328 pr_err("evaluation error HKEY.SINF\n");
329 return 0;
330 }
331
332 hkey = buffer.pointer;
333 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
334 pr_err("Invalid HKEY.SINF\n");
335 status = AE_ERROR;
336 goto end;
337 }
338
339 if (pcc->num_sifr < hkey->package.count) {
340 pr_err("SQTY reports bad SINF length\n");
341 status = AE_ERROR;
342 goto end;
343 }
344
345 for (i = 0; i < hkey->package.count; i++) {
346 union acpi_object *element = &(hkey->package.elements[i]);
347 if (likely(element->type == ACPI_TYPE_INTEGER)) {
348 pcc->sinf[i] = element->integer.value;
349 } else
350 pr_err("Invalid HKEY.SINF data\n");
351 }
352 pcc->sinf[hkey->package.count] = -1;
353
354end:
355 kfree(buffer.pointer);
356 return status == AE_OK;
357}
358
359/* backlight API interface functions */
360
361/* This driver currently treats AC and DC brightness identical,
362 * since we don't need to invent an interface to the core ACPI
363 * logic to receive events in case a power supply is plugged in
364 * or removed */
365
366static int bl_get(struct backlight_device *bd)
367{
368 struct pcc_acpi *pcc = bl_get_data(bd);
369
370 if (!acpi_pcc_retrieve_biosdata(pcc))
371 return -EIO;
372
373 return pcc->sinf[SINF_AC_CUR_BRIGHT];
374}
375
376static int bl_set_status(struct backlight_device *bd)
377{
378 struct pcc_acpi *pcc = bl_get_data(bd);
379 int bright = bd->props.brightness;
380 int rc;
381
382 if (!acpi_pcc_retrieve_biosdata(pcc))
383 return -EIO;
384
385 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
386 bright = pcc->sinf[SINF_AC_MIN_BRIGHT];
387
388 if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
389 bright = pcc->sinf[SINF_DC_MIN_BRIGHT];
390
391 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
392 bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
393 return -EINVAL;
394
395 rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
396 if (rc < 0)
397 return rc;
398
399 return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
400}
401
402static const struct backlight_ops pcc_backlight_ops = {
403 .get_brightness = bl_get,
404 .update_status = bl_set_status,
405};
406
407
408/* returns ACPI_SUCCESS if methods to control optical drive are present */
409
410static acpi_status check_optd_present(void)
411{
412 acpi_status status = AE_OK;
413 acpi_handle handle;
414
415 status = acpi_get_handle(NULL, "\\_SB.STAT", &handle);
416 if (ACPI_FAILURE(status))
417 goto out;
418 status = acpi_get_handle(NULL, "\\_SB.FBAY", &handle);
419 if (ACPI_FAILURE(status))
420 goto out;
421 status = acpi_get_handle(NULL, "\\_SB.CDDI", &handle);
422 if (ACPI_FAILURE(status))
423 goto out;
424
425out:
426 return status;
427}
428
429/* get optical driver power state */
430
431static int get_optd_power_state(void)
432{
433 acpi_status status;
434 unsigned long long state;
435 int result;
436
437 status = acpi_evaluate_integer(NULL, "\\_SB.STAT", NULL, &state);
438 if (ACPI_FAILURE(status)) {
439 pr_err("evaluation error _SB.STAT\n");
440 result = -EIO;
441 goto out;
442 }
443 switch (state) {
444 case 0: /* power off */
445 result = 0;
446 break;
447 case 0x0f: /* power on */
448 result = 1;
449 break;
450 default:
451 result = -EIO;
452 break;
453 }
454
455out:
456 return result;
457}
458
459/* set optical drive power state */
460
461static int set_optd_power_state(int new_state)
462{
463 int result;
464 acpi_status status;
465
466 result = get_optd_power_state();
467 if (result < 0)
468 goto out;
469 if (new_state == result)
470 goto out;
471
472 switch (new_state) {
473 case 0: /* power off */
474 /* Call CDDR instead, since they both call the same method
475 * while CDDI takes 1 arg and we are not quite sure what it is.
476 */
477 status = acpi_evaluate_object(NULL, "\\_SB.CDDR", NULL, NULL);
478 if (ACPI_FAILURE(status)) {
479 pr_err("evaluation error _SB.CDDR\n");
480 result = -EIO;
481 }
482 break;
483 case 1: /* power on */
484 status = acpi_evaluate_object(NULL, "\\_SB.FBAY", NULL, NULL);
485 if (ACPI_FAILURE(status)) {
486 pr_err("evaluation error _SB.FBAY\n");
487 result = -EIO;
488 }
489 break;
490 default:
491 result = -EINVAL;
492 break;
493 }
494
495out:
496 return result;
497}
498
499
500/* sysfs user interface functions */
501
502static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr,
503 char *buf)
504{
505 struct acpi_device *acpi = to_acpi_device(dev);
506 struct pcc_acpi *pcc = acpi_driver_data(acpi);
507
508 if (!acpi_pcc_retrieve_biosdata(pcc))
509 return -EIO;
510
511 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
512}
513
514static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr,
515 char *buf)
516{
517 struct acpi_device *acpi = to_acpi_device(dev);
518 struct pcc_acpi *pcc = acpi_driver_data(acpi);
519
520 if (!acpi_pcc_retrieve_biosdata(pcc))
521 return -EIO;
522
523 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
524}
525
526static ssize_t mute_show(struct device *dev, struct device_attribute *attr,
527 char *buf)
528{
529 struct acpi_device *acpi = to_acpi_device(dev);
530 struct pcc_acpi *pcc = acpi_driver_data(acpi);
531
532 if (!acpi_pcc_retrieve_biosdata(pcc))
533 return -EIO;
534
535 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_MUTE]);
536}
537
538static ssize_t mute_store(struct device *dev, struct device_attribute *attr,
539 const char *buf, size_t count)
540{
541 struct acpi_device *acpi = to_acpi_device(dev);
542 struct pcc_acpi *pcc = acpi_driver_data(acpi);
543 int err, val;
544
545 err = kstrtoint(buf, 0, &val);
546 if (err)
547 return err;
548 if (val == 0 || val == 1) {
549 acpi_pcc_write_sset(pcc, SINF_MUTE, val);
550 pcc->mute = val;
551 }
552
553 return count;
554}
555
556static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr,
557 char *buf)
558{
559 struct acpi_device *acpi = to_acpi_device(dev);
560 struct pcc_acpi *pcc = acpi_driver_data(acpi);
561
562 if (!acpi_pcc_retrieve_biosdata(pcc))
563 return -EIO;
564
565 return sysfs_emit(buf, "%u\n", pcc->sticky_key);
566}
567
568static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr,
569 const char *buf, size_t count)
570{
571 struct acpi_device *acpi = to_acpi_device(dev);
572 struct pcc_acpi *pcc = acpi_driver_data(acpi);
573 int err, val;
574
575 err = kstrtoint(buf, 0, &val);
576 if (err)
577 return err;
578 if (val == 0 || val == 1) {
579 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
580 pcc->sticky_key = val;
581 }
582
583 return count;
584}
585
586static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr,
587 char *buf)
588{
589 struct acpi_device *acpi = to_acpi_device(dev);
590 struct pcc_acpi *pcc = acpi_driver_data(acpi);
591 int result;
592
593 if (!acpi_pcc_retrieve_biosdata(pcc))
594 return -EIO;
595
596 switch (pcc->sinf[SINF_ECO_MODE]) {
597 case (ECO_MODE_OFF + 3):
598 result = 0;
599 break;
600 case (ECO_MODE_ON + 3):
601 result = 1;
602 break;
603 default:
604 result = -EIO;
605 break;
606 }
607 return sysfs_emit(buf, "%u\n", result);
608}
609
610static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr,
611 const char *buf, size_t count)
612{
613 struct acpi_device *acpi = to_acpi_device(dev);
614 struct pcc_acpi *pcc = acpi_driver_data(acpi);
615 int err, state;
616
617 union acpi_object param[2];
618 struct acpi_object_list input;
619 acpi_status status;
620
621 param[0].type = ACPI_TYPE_INTEGER;
622 param[0].integer.value = 0x15;
623 param[1].type = ACPI_TYPE_INTEGER;
624 input.count = 2;
625 input.pointer = param;
626
627 err = kstrtoint(buf, 0, &state);
628 if (err)
629 return err;
630
631 switch (state) {
632 case 0:
633 param[1].integer.value = ECO_MODE_OFF;
634 pcc->sinf[SINF_ECO_MODE] = 0;
635 pcc->eco_mode = 0;
636 break;
637 case 1:
638 param[1].integer.value = ECO_MODE_ON;
639 pcc->sinf[SINF_ECO_MODE] = 1;
640 pcc->eco_mode = 1;
641 break;
642 default:
643 /* nothing to do */
644 return count;
645 }
646
647 status = acpi_evaluate_object(NULL, METHOD_ECWR,
648 &input, NULL);
649 if (ACPI_FAILURE(status)) {
650 pr_err("%s evaluation failed\n", METHOD_ECWR);
651 return -EINVAL;
652 }
653
654 return count;
655}
656
657static ssize_t ac_brightness_show(struct device *dev, struct device_attribute *attr,
658 char *buf)
659{
660 struct acpi_device *acpi = to_acpi_device(dev);
661 struct pcc_acpi *pcc = acpi_driver_data(acpi);
662
663 if (!acpi_pcc_retrieve_biosdata(pcc))
664 return -EIO;
665
666 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);
667}
668
669static ssize_t ac_brightness_store(struct device *dev, struct device_attribute *attr,
670 const char *buf, size_t count)
671{
672 struct acpi_device *acpi = to_acpi_device(dev);
673 struct pcc_acpi *pcc = acpi_driver_data(acpi);
674 int err, val;
675
676 err = kstrtoint(buf, 0, &val);
677 if (err)
678 return err;
679 if (val >= 0 && val <= 255) {
680 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val);
681 pcc->ac_brightness = val;
682 }
683
684 return count;
685}
686
687static ssize_t dc_brightness_show(struct device *dev, struct device_attribute *attr,
688 char *buf)
689{
690 struct acpi_device *acpi = to_acpi_device(dev);
691 struct pcc_acpi *pcc = acpi_driver_data(acpi);
692
693 if (!acpi_pcc_retrieve_biosdata(pcc))
694 return -EIO;
695
696 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);
697}
698
699static ssize_t dc_brightness_store(struct device *dev, struct device_attribute *attr,
700 const char *buf, size_t count)
701{
702 struct acpi_device *acpi = to_acpi_device(dev);
703 struct pcc_acpi *pcc = acpi_driver_data(acpi);
704 int err, val;
705
706 err = kstrtoint(buf, 0, &val);
707 if (err)
708 return err;
709 if (val >= 0 && val <= 255) {
710 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val);
711 pcc->dc_brightness = val;
712 }
713
714 return count;
715}
716
717static ssize_t current_brightness_show(struct device *dev, struct device_attribute *attr,
718 char *buf)
719{
720 struct acpi_device *acpi = to_acpi_device(dev);
721 struct pcc_acpi *pcc = acpi_driver_data(acpi);
722
723 if (!acpi_pcc_retrieve_biosdata(pcc))
724 return -EIO;
725
726 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);
727}
728
729static ssize_t current_brightness_store(struct device *dev, struct device_attribute *attr,
730 const char *buf, size_t count)
731{
732 struct acpi_device *acpi = to_acpi_device(dev);
733 struct pcc_acpi *pcc = acpi_driver_data(acpi);
734 int err, val;
735
736 err = kstrtoint(buf, 0, &val);
737 if (err)
738 return err;
739
740 if (val >= 0 && val <= 255) {
741 err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val);
742 pcc->current_brightness = val;
743 }
744
745 return count;
746}
747
748static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr,
749 char *buf)
750{
751 return sysfs_emit(buf, "%d\n", get_optd_power_state());
752}
753
754static ssize_t cdpower_store(struct device *dev, struct device_attribute *attr,
755 const char *buf, size_t count)
756{
757 int err, val;
758
759 err = kstrtoint(buf, 10, &val);
760 if (err)
761 return err;
762 set_optd_power_state(val);
763 return count;
764}
765
766static DEVICE_ATTR_RO(numbatt);
767static DEVICE_ATTR_RO(lcdtype);
768static DEVICE_ATTR_RW(mute);
769static DEVICE_ATTR_RW(sticky_key);
770static DEVICE_ATTR_RW(eco_mode);
771static DEVICE_ATTR_RW(ac_brightness);
772static DEVICE_ATTR_RW(dc_brightness);
773static DEVICE_ATTR_RW(current_brightness);
774static DEVICE_ATTR_RW(cdpower);
775
776static struct attribute *pcc_sysfs_entries[] = {
777 &dev_attr_numbatt.attr,
778 &dev_attr_lcdtype.attr,
779 &dev_attr_mute.attr,
780 &dev_attr_sticky_key.attr,
781 &dev_attr_eco_mode.attr,
782 &dev_attr_ac_brightness.attr,
783 &dev_attr_dc_brightness.attr,
784 &dev_attr_current_brightness.attr,
785 &dev_attr_cdpower.attr,
786 NULL,
787};
788
789static const struct attribute_group pcc_attr_group = {
790 .name = NULL, /* put in device directory */
791 .attrs = pcc_sysfs_entries,
792};
793
794
795/* hotkey input device driver */
796
797static int sleep_keydown_seen;
798static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
799{
800 struct input_dev *hotk_input_dev = pcc->input_dev;
801 int rc;
802 unsigned long long result;
803 unsigned int key;
804 unsigned int updown;
805
806 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
807 NULL, &result);
808 if (ACPI_FAILURE(rc)) {
809 pr_err("error getting hotkey status\n");
810 return;
811 }
812
813 key = result & 0xf;
814 updown = result & 0x80; /* 0x80 == key down; 0x00 = key up */
815
816 /* hack: some firmware sends no key down for sleep / hibernate */
817 if (key == 7 || key == 10) {
818 if (updown)
819 sleep_keydown_seen = 1;
820 if (!sleep_keydown_seen)
821 sparse_keymap_report_event(hotk_input_dev,
822 key, 0x80, false);
823 }
824
825 /*
826 * Don't report brightness key-presses if they are also reported
827 * by the ACPI video bus.
828 */
829 if ((key == 1 || key == 2) && acpi_video_handles_brightness_key_presses())
830 return;
831
832 if (!sparse_keymap_report_event(hotk_input_dev, key, updown, false))
833 pr_err("Unknown hotkey event: 0x%04llx\n", result);
834}
835
836static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
837{
838 struct pcc_acpi *pcc = acpi_driver_data(device);
839
840 switch (event) {
841 case HKEY_NOTIFY:
842 acpi_pcc_generate_keyinput(pcc);
843 break;
844 default:
845 /* nothing to do */
846 break;
847 }
848}
849
850static void pcc_optd_notify(acpi_handle handle, u32 event, void *data)
851{
852 if (event != ACPI_NOTIFY_EJECT_REQUEST)
853 return;
854
855 set_optd_power_state(0);
856}
857
858static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node)
859{
860 acpi_status status;
861 acpi_handle handle;
862
863 status = acpi_get_handle(NULL, node, &handle);
864
865 if (ACPI_SUCCESS(status)) {
866 status = acpi_install_notify_handler(handle,
867 ACPI_SYSTEM_NOTIFY,
868 pcc_optd_notify, pcc);
869 if (ACPI_FAILURE(status))
870 pr_err("Failed to register notify on %s\n", node);
871 } else
872 return -ENODEV;
873
874 return 0;
875}
876
877static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node)
878{
879 acpi_status status = AE_OK;
880 acpi_handle handle;
881
882 status = acpi_get_handle(NULL, node, &handle);
883
884 if (ACPI_SUCCESS(status)) {
885 status = acpi_remove_notify_handler(handle,
886 ACPI_SYSTEM_NOTIFY,
887 pcc_optd_notify);
888 if (ACPI_FAILURE(status))
889 pr_err("Error removing optd notify handler %s\n",
890 node);
891 }
892}
893
894static int acpi_pcc_init_input(struct pcc_acpi *pcc)
895{
896 struct input_dev *input_dev;
897 int error;
898
899 input_dev = input_allocate_device();
900 if (!input_dev)
901 return -ENOMEM;
902
903 input_dev->name = ACPI_PCC_DRIVER_NAME;
904 input_dev->phys = ACPI_PCC_INPUT_PHYS;
905 input_dev->id.bustype = BUS_HOST;
906 input_dev->id.vendor = 0x0001;
907 input_dev->id.product = 0x0001;
908 input_dev->id.version = 0x0100;
909
910 error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
911 if (error) {
912 pr_err("Unable to setup input device keymap\n");
913 goto err_free_dev;
914 }
915
916 error = input_register_device(input_dev);
917 if (error) {
918 pr_err("Unable to register input device\n");
919 goto err_free_dev;
920 }
921
922 pcc->input_dev = input_dev;
923 return 0;
924
925 err_free_dev:
926 input_free_device(input_dev);
927 return error;
928}
929
930/* kernel module interface */
931
932#ifdef CONFIG_PM_SLEEP
933static int acpi_pcc_hotkey_resume(struct device *dev)
934{
935 struct pcc_acpi *pcc;
936
937 if (!dev)
938 return -EINVAL;
939
940 pcc = acpi_driver_data(to_acpi_device(dev));
941 if (!pcc)
942 return -EINVAL;
943
944 acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);
945 acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode);
946 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key);
947 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness);
948 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness);
949 acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness);
950
951 return 0;
952}
953#endif
954
955static int acpi_pcc_hotkey_add(struct acpi_device *device)
956{
957 struct backlight_properties props;
958 struct pcc_acpi *pcc;
959 int num_sifr, result;
960
961 if (!device)
962 return -EINVAL;
963
964 num_sifr = acpi_pcc_get_sqty(device);
965
966 if (num_sifr < 0 || num_sifr > 255) {
967 pr_err("num_sifr out of range");
968 return -ENODEV;
969 }
970
971 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
972 if (!pcc) {
973 pr_err("Couldn't allocate mem for pcc");
974 return -ENOMEM;
975 }
976
977 pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);
978 if (!pcc->sinf) {
979 result = -ENOMEM;
980 goto out_hotkey;
981 }
982
983 pcc->device = device;
984 pcc->handle = device->handle;
985 pcc->num_sifr = num_sifr;
986 device->driver_data = pcc;
987 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
988 strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
989
990 result = acpi_pcc_init_input(pcc);
991 if (result) {
992 pr_err("Error installing keyinput handler\n");
993 goto out_sinf;
994 }
995
996 if (!acpi_pcc_retrieve_biosdata(pcc)) {
997 result = -EIO;
998 pr_err("Couldn't retrieve BIOS data\n");
999 goto out_input;
1000 }
1001
1002 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1003 /* initialize backlight */
1004 memset(&props, 0, sizeof(struct backlight_properties));
1005 props.type = BACKLIGHT_PLATFORM;
1006 props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
1007
1008 pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
1009 &pcc_backlight_ops, &props);
1010 if (IS_ERR(pcc->backlight)) {
1011 result = PTR_ERR(pcc->backlight);
1012 goto out_input;
1013 }
1014
1015 /* read the initial brightness setting from the hardware */
1016 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
1017 }
1018
1019 /* Reset initial sticky key mode since the hardware register state is not consistent */
1020 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0);
1021 pcc->sticky_key = 0;
1022
1023 pcc->eco_mode = pcc->sinf[SINF_ECO_MODE];
1024 pcc->mute = pcc->sinf[SINF_MUTE];
1025 pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
1026 pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT];
1027 pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT];
1028
1029 /* add sysfs attributes */
1030 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
1031 if (result)
1032 goto out_backlight;
1033
1034 /* optical drive initialization */
1035 if (ACPI_SUCCESS(check_optd_present())) {
1036 pcc->platform = platform_device_register_simple("panasonic",
1037 PLATFORM_DEVID_NONE, NULL, 0);
1038 if (IS_ERR(pcc->platform)) {
1039 result = PTR_ERR(pcc->platform);
1040 goto out_backlight;
1041 }
1042 result = device_create_file(&pcc->platform->dev,
1043 &dev_attr_cdpower);
1044 pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1045 if (result)
1046 goto out_platform;
1047 } else {
1048 pcc->platform = NULL;
1049 }
1050
1051 i8042_install_filter(panasonic_i8042_filter);
1052 return 0;
1053
1054out_platform:
1055 platform_device_unregister(pcc->platform);
1056out_backlight:
1057 backlight_device_unregister(pcc->backlight);
1058out_input:
1059 input_unregister_device(pcc->input_dev);
1060out_sinf:
1061 kfree(pcc->sinf);
1062out_hotkey:
1063 kfree(pcc);
1064
1065 return result;
1066}
1067
1068static void acpi_pcc_hotkey_remove(struct acpi_device *device)
1069{
1070 struct pcc_acpi *pcc = acpi_driver_data(device);
1071
1072 if (!device || !pcc)
1073 return;
1074
1075 i8042_remove_filter(panasonic_i8042_filter);
1076
1077 if (pcc->platform) {
1078 device_remove_file(&pcc->platform->dev, &dev_attr_cdpower);
1079 platform_device_unregister(pcc->platform);
1080 }
1081 pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1082
1083 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
1084
1085 backlight_device_unregister(pcc->backlight);
1086
1087 input_unregister_device(pcc->input_dev);
1088
1089 kfree(pcc->sinf);
1090 kfree(pcc);
1091}
1092
1093module_acpi_driver(acpi_pcc_driver);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Panasonic HotKey and LCD brightness control driver
4 * (C) 2004 Hiroshi Miura <miura@da-cha.org>
5 * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
6 * (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp>
7 * (C) 2004 David Bronaugh <dbronaugh>
8 * (C) 2006-2008 Harald Welte <laforge@gnumonks.org>
9 *
10 * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
11 *
12 *---------------------------------------------------------------------------
13 *
14 * ChangeLog:
15 * Sep.23, 2008 Harald Welte <laforge@gnumonks.org>
16 * -v0.95 rename driver from drivers/acpi/pcc_acpi.c to
17 * drivers/misc/panasonic-laptop.c
18 *
19 * Jul.04, 2008 Harald Welte <laforge@gnumonks.org>
20 * -v0.94 replace /proc interface with device attributes
21 * support {set,get}keycode on th input device
22 *
23 * Jun.27, 2008 Harald Welte <laforge@gnumonks.org>
24 * -v0.92 merge with 2.6.26-rc6 input API changes
25 * remove broken <= 2.6.15 kernel support
26 * resolve all compiler warnings
27 * various coding style fixes (checkpatch.pl)
28 * add support for backlight api
29 * major code restructuring
30 *
31 * Dac.28, 2007 Harald Welte <laforge@gnumonks.org>
32 * -v0.91 merge with 2.6.24-rc6 ACPI changes
33 *
34 * Nov.04, 2006 Hiroshi Miura <miura@da-cha.org>
35 * -v0.9 remove warning about section reference.
36 * remove acpi_os_free
37 * add /proc/acpi/pcc/brightness interface for HAL access
38 * merge dbronaugh's enhancement
39 * Aug.17, 2004 David Bronaugh (dbronaugh)
40 * - Added screen brightness setting interface
41 * Thanks to FreeBSD crew (acpi_panasonic.c)
42 * for the ideas I needed to accomplish it
43 *
44 * May.29, 2006 Hiroshi Miura <miura@da-cha.org>
45 * -v0.8.4 follow to change keyinput structure
46 * thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>,
47 * Jacob Bower <jacob.bower@ic.ac.uk> and
48 * Hiroshi Yokota for providing solutions.
49 *
50 * Oct.02, 2004 Hiroshi Miura <miura@da-cha.org>
51 * -v0.8.2 merge code of YOKOTA Hiroshi
52 * <yokota@netlab.is.tsukuba.ac.jp>.
53 * Add sticky key mode interface.
54 * Refactoring acpi_pcc_generate_keyinput().
55 *
56 * Sep.15, 2004 Hiroshi Miura <miura@da-cha.org>
57 * -v0.8 Generate key input event on input subsystem.
58 * This is based on yet another driver written by
59 * Ryuta Nakanishi.
60 *
61 * Sep.10, 2004 Hiroshi Miura <miura@da-cha.org>
62 * -v0.7 Change proc interface functions using seq_file
63 * facility as same as other ACPI drivers.
64 *
65 * Aug.28, 2004 Hiroshi Miura <miura@da-cha.org>
66 * -v0.6.4 Fix a silly error with status checking
67 *
68 * Aug.25, 2004 Hiroshi Miura <miura@da-cha.org>
69 * -v0.6.3 replace read_acpi_int by standard function
70 * acpi_evaluate_integer
71 * some clean up and make smart copyright notice.
72 * fix return value of pcc_acpi_get_key()
73 * fix checking return value of acpi_bus_register_driver()
74 *
75 * Aug.22, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
76 * -v0.6.2 Add check on ACPI data (num_sifr)
77 * Coding style cleanups, better error messages/handling
78 * Fixed an off-by-one error in memory allocation
79 *
80 * Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
81 * -v0.6.1 Fix a silly error with status checking
82 *
83 * Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
84 * - v0.6 Correct brightness controls to reflect reality
85 * based on information gleaned by Hiroshi Miura
86 * and discussions with Hiroshi Miura
87 *
88 * Aug.10, 2004 Hiroshi Miura <miura@da-cha.org>
89 * - v0.5 support LCD brightness control
90 * based on the disclosed information by MEI.
91 *
92 * Jul.25, 2004 Hiroshi Miura <miura@da-cha.org>
93 * - v0.4 first post version
94 * add function to retrive SIFR
95 *
96 * Jul.24, 2004 Hiroshi Miura <miura@da-cha.org>
97 * - v0.3 get proper status of hotkey
98 *
99 * Jul.22, 2004 Hiroshi Miura <miura@da-cha.org>
100 * - v0.2 add HotKey handler
101 *
102 * Jul.17, 2004 Hiroshi Miura <miura@da-cha.org>
103 * - v0.1 start from toshiba_acpi driver written by John Belmonte
104 */
105
106#include <linux/kernel.h>
107#include <linux/module.h>
108#include <linux/init.h>
109#include <linux/types.h>
110#include <linux/backlight.h>
111#include <linux/ctype.h>
112#include <linux/seq_file.h>
113#include <linux/uaccess.h>
114#include <linux/slab.h>
115#include <linux/acpi.h>
116#include <linux/input.h>
117#include <linux/input/sparse-keymap.h>
118
119#ifndef ACPI_HOTKEY_COMPONENT
120#define ACPI_HOTKEY_COMPONENT 0x10000000
121#endif
122
123#define _COMPONENT ACPI_HOTKEY_COMPONENT
124
125MODULE_AUTHOR("Hiroshi Miura, David Bronaugh and Harald Welte");
126MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
127MODULE_LICENSE("GPL");
128
129#define LOGPREFIX "pcc_acpi: "
130
131/* Define ACPI PATHs */
132/* Lets note hotkeys */
133#define METHOD_HKEY_QUERY "HINF"
134#define METHOD_HKEY_SQTY "SQTY"
135#define METHOD_HKEY_SINF "SINF"
136#define METHOD_HKEY_SSET "SSET"
137#define HKEY_NOTIFY 0x80
138
139#define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support"
140#define ACPI_PCC_DEVICE_NAME "Hotkey"
141#define ACPI_PCC_CLASS "pcc"
142
143#define ACPI_PCC_INPUT_PHYS "panasonic/hkey0"
144
145/* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
146 ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00
147*/
148enum SINF_BITS { SINF_NUM_BATTERIES = 0,
149 SINF_LCD_TYPE,
150 SINF_AC_MAX_BRIGHT,
151 SINF_AC_MIN_BRIGHT,
152 SINF_AC_CUR_BRIGHT,
153 SINF_DC_MAX_BRIGHT,
154 SINF_DC_MIN_BRIGHT,
155 SINF_DC_CUR_BRIGHT,
156 SINF_MUTE,
157 SINF_RESERVED,
158 SINF_ENV_STATE,
159 SINF_STICKY_KEY = 0x80,
160 };
161/* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
162
163static int acpi_pcc_hotkey_add(struct acpi_device *device);
164static int acpi_pcc_hotkey_remove(struct acpi_device *device);
165static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);
166
167static const struct acpi_device_id pcc_device_ids[] = {
168 { "MAT0012", 0},
169 { "MAT0013", 0},
170 { "MAT0018", 0},
171 { "MAT0019", 0},
172 { "", 0},
173};
174MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
175
176#ifdef CONFIG_PM_SLEEP
177static int acpi_pcc_hotkey_resume(struct device *dev);
178#endif
179static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
180
181static struct acpi_driver acpi_pcc_driver = {
182 .name = ACPI_PCC_DRIVER_NAME,
183 .class = ACPI_PCC_CLASS,
184 .ids = pcc_device_ids,
185 .ops = {
186 .add = acpi_pcc_hotkey_add,
187 .remove = acpi_pcc_hotkey_remove,
188 .notify = acpi_pcc_hotkey_notify,
189 },
190 .drv.pm = &acpi_pcc_hotkey_pm,
191};
192
193static const struct key_entry panasonic_keymap[] = {
194 { KE_KEY, 0, { KEY_RESERVED } },
195 { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
196 { KE_KEY, 2, { KEY_BRIGHTNESSUP } },
197 { KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
198 { KE_KEY, 4, { KEY_MUTE } },
199 { KE_KEY, 5, { KEY_VOLUMEDOWN } },
200 { KE_KEY, 6, { KEY_VOLUMEUP } },
201 { KE_KEY, 7, { KEY_SLEEP } },
202 { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
203 { KE_KEY, 9, { KEY_BATTERY } },
204 { KE_KEY, 10, { KEY_SUSPEND } },
205 { KE_END, 0 }
206};
207
208struct pcc_acpi {
209 acpi_handle handle;
210 unsigned long num_sifr;
211 int sticky_mode;
212 u32 *sinf;
213 struct acpi_device *device;
214 struct input_dev *input_dev;
215 struct backlight_device *backlight;
216};
217
218/* method access functions */
219static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
220{
221 union acpi_object in_objs[] = {
222 { .integer.type = ACPI_TYPE_INTEGER,
223 .integer.value = func, },
224 { .integer.type = ACPI_TYPE_INTEGER,
225 .integer.value = val, },
226 };
227 struct acpi_object_list params = {
228 .count = ARRAY_SIZE(in_objs),
229 .pointer = in_objs,
230 };
231 acpi_status status = AE_OK;
232
233 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
234 ¶ms, NULL);
235
236 return (status == AE_OK) ? 0 : -EIO;
237}
238
239static inline int acpi_pcc_get_sqty(struct acpi_device *device)
240{
241 unsigned long long s;
242 acpi_status status;
243
244 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
245 NULL, &s);
246 if (ACPI_SUCCESS(status))
247 return s;
248 else {
249 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
250 "evaluation error HKEY.SQTY\n"));
251 return -EINVAL;
252 }
253}
254
255static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
256{
257 acpi_status status;
258 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
259 union acpi_object *hkey = NULL;
260 int i;
261
262 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
263 &buffer);
264 if (ACPI_FAILURE(status)) {
265 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
266 "evaluation error HKEY.SINF\n"));
267 return 0;
268 }
269
270 hkey = buffer.pointer;
271 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
272 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n"));
273 status = AE_ERROR;
274 goto end;
275 }
276
277 if (pcc->num_sifr < hkey->package.count) {
278 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
279 "SQTY reports bad SINF length\n"));
280 status = AE_ERROR;
281 goto end;
282 }
283
284 for (i = 0; i < hkey->package.count; i++) {
285 union acpi_object *element = &(hkey->package.elements[i]);
286 if (likely(element->type == ACPI_TYPE_INTEGER)) {
287 pcc->sinf[i] = element->integer.value;
288 } else
289 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
290 "Invalid HKEY.SINF data\n"));
291 }
292 pcc->sinf[hkey->package.count] = -1;
293
294end:
295 kfree(buffer.pointer);
296 return status == AE_OK;
297}
298
299/* backlight API interface functions */
300
301/* This driver currently treats AC and DC brightness identical,
302 * since we don't need to invent an interface to the core ACPI
303 * logic to receive events in case a power supply is plugged in
304 * or removed */
305
306static int bl_get(struct backlight_device *bd)
307{
308 struct pcc_acpi *pcc = bl_get_data(bd);
309
310 if (!acpi_pcc_retrieve_biosdata(pcc))
311 return -EIO;
312
313 return pcc->sinf[SINF_AC_CUR_BRIGHT];
314}
315
316static int bl_set_status(struct backlight_device *bd)
317{
318 struct pcc_acpi *pcc = bl_get_data(bd);
319 int bright = bd->props.brightness;
320 int rc;
321
322 if (!acpi_pcc_retrieve_biosdata(pcc))
323 return -EIO;
324
325 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
326 bright = pcc->sinf[SINF_AC_MIN_BRIGHT];
327
328 if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
329 bright = pcc->sinf[SINF_DC_MIN_BRIGHT];
330
331 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
332 bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
333 return -EINVAL;
334
335 rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
336 if (rc < 0)
337 return rc;
338
339 return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
340}
341
342static const struct backlight_ops pcc_backlight_ops = {
343 .get_brightness = bl_get,
344 .update_status = bl_set_status,
345};
346
347
348/* sysfs user interface functions */
349
350static ssize_t show_numbatt(struct device *dev, struct device_attribute *attr,
351 char *buf)
352{
353 struct acpi_device *acpi = to_acpi_device(dev);
354 struct pcc_acpi *pcc = acpi_driver_data(acpi);
355
356 if (!acpi_pcc_retrieve_biosdata(pcc))
357 return -EIO;
358
359 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
360}
361
362static ssize_t show_lcdtype(struct device *dev, struct device_attribute *attr,
363 char *buf)
364{
365 struct acpi_device *acpi = to_acpi_device(dev);
366 struct pcc_acpi *pcc = acpi_driver_data(acpi);
367
368 if (!acpi_pcc_retrieve_biosdata(pcc))
369 return -EIO;
370
371 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
372}
373
374static ssize_t show_mute(struct device *dev, struct device_attribute *attr,
375 char *buf)
376{
377 struct acpi_device *acpi = to_acpi_device(dev);
378 struct pcc_acpi *pcc = acpi_driver_data(acpi);
379
380 if (!acpi_pcc_retrieve_biosdata(pcc))
381 return -EIO;
382
383 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]);
384}
385
386static ssize_t show_sticky(struct device *dev, struct device_attribute *attr,
387 char *buf)
388{
389 struct acpi_device *acpi = to_acpi_device(dev);
390 struct pcc_acpi *pcc = acpi_driver_data(acpi);
391
392 if (!acpi_pcc_retrieve_biosdata(pcc))
393 return -EIO;
394
395 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_STICKY_KEY]);
396}
397
398static ssize_t set_sticky(struct device *dev, struct device_attribute *attr,
399 const char *buf, size_t count)
400{
401 struct acpi_device *acpi = to_acpi_device(dev);
402 struct pcc_acpi *pcc = acpi_driver_data(acpi);
403 int val;
404
405 if (count && sscanf(buf, "%i", &val) == 1 &&
406 (val == 0 || val == 1)) {
407 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
408 pcc->sticky_mode = val;
409 }
410
411 return count;
412}
413
414static DEVICE_ATTR(numbatt, S_IRUGO, show_numbatt, NULL);
415static DEVICE_ATTR(lcdtype, S_IRUGO, show_lcdtype, NULL);
416static DEVICE_ATTR(mute, S_IRUGO, show_mute, NULL);
417static DEVICE_ATTR(sticky_key, S_IRUGO | S_IWUSR, show_sticky, set_sticky);
418
419static struct attribute *pcc_sysfs_entries[] = {
420 &dev_attr_numbatt.attr,
421 &dev_attr_lcdtype.attr,
422 &dev_attr_mute.attr,
423 &dev_attr_sticky_key.attr,
424 NULL,
425};
426
427static const struct attribute_group pcc_attr_group = {
428 .name = NULL, /* put in device directory */
429 .attrs = pcc_sysfs_entries,
430};
431
432
433/* hotkey input device driver */
434
435static int sleep_keydown_seen;
436static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
437{
438 struct input_dev *hotk_input_dev = pcc->input_dev;
439 int rc;
440 unsigned long long result;
441
442 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
443 NULL, &result);
444 if (ACPI_FAILURE(rc)) {
445 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
446 "error getting hotkey status\n"));
447 return;
448 }
449
450 /* hack: some firmware sends no key down for sleep / hibernate */
451 if ((result & 0xf) == 0x7 || (result & 0xf) == 0xa) {
452 if (result & 0x80)
453 sleep_keydown_seen = 1;
454 if (!sleep_keydown_seen)
455 sparse_keymap_report_event(hotk_input_dev,
456 result & 0xf, 0x80, false);
457 }
458
459 if (!sparse_keymap_report_event(hotk_input_dev,
460 result & 0xf, result & 0x80, false))
461 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
462 "Unknown hotkey event: %d\n", result));
463}
464
465static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
466{
467 struct pcc_acpi *pcc = acpi_driver_data(device);
468
469 switch (event) {
470 case HKEY_NOTIFY:
471 acpi_pcc_generate_keyinput(pcc);
472 break;
473 default:
474 /* nothing to do */
475 break;
476 }
477}
478
479static int acpi_pcc_init_input(struct pcc_acpi *pcc)
480{
481 struct input_dev *input_dev;
482 int error;
483
484 input_dev = input_allocate_device();
485 if (!input_dev)
486 return -ENOMEM;
487
488 input_dev->name = ACPI_PCC_DRIVER_NAME;
489 input_dev->phys = ACPI_PCC_INPUT_PHYS;
490 input_dev->id.bustype = BUS_HOST;
491 input_dev->id.vendor = 0x0001;
492 input_dev->id.product = 0x0001;
493 input_dev->id.version = 0x0100;
494
495 error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
496 if (error) {
497 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
498 "Unable to setup input device keymap\n"));
499 goto err_free_dev;
500 }
501
502 error = input_register_device(input_dev);
503 if (error) {
504 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
505 "Unable to register input device\n"));
506 goto err_free_dev;
507 }
508
509 pcc->input_dev = input_dev;
510 return 0;
511
512 err_free_dev:
513 input_free_device(input_dev);
514 return error;
515}
516
517/* kernel module interface */
518
519#ifdef CONFIG_PM_SLEEP
520static int acpi_pcc_hotkey_resume(struct device *dev)
521{
522 struct pcc_acpi *pcc;
523
524 if (!dev)
525 return -EINVAL;
526
527 pcc = acpi_driver_data(to_acpi_device(dev));
528 if (!pcc)
529 return -EINVAL;
530
531 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n",
532 pcc->sticky_mode));
533
534 return acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_mode);
535}
536#endif
537
538static int acpi_pcc_hotkey_add(struct acpi_device *device)
539{
540 struct backlight_properties props;
541 struct pcc_acpi *pcc;
542 int num_sifr, result;
543
544 if (!device)
545 return -EINVAL;
546
547 num_sifr = acpi_pcc_get_sqty(device);
548
549 if (num_sifr < 0 || num_sifr > 255) {
550 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr out of range"));
551 return -ENODEV;
552 }
553
554 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
555 if (!pcc) {
556 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
557 "Couldn't allocate mem for pcc"));
558 return -ENOMEM;
559 }
560
561 pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);
562 if (!pcc->sinf) {
563 result = -ENOMEM;
564 goto out_hotkey;
565 }
566
567 pcc->device = device;
568 pcc->handle = device->handle;
569 pcc->num_sifr = num_sifr;
570 device->driver_data = pcc;
571 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
572 strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
573
574 result = acpi_pcc_init_input(pcc);
575 if (result) {
576 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
577 "Error installing keyinput handler\n"));
578 goto out_sinf;
579 }
580
581 if (!acpi_pcc_retrieve_biosdata(pcc)) {
582 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
583 "Couldn't retrieve BIOS data\n"));
584 result = -EIO;
585 goto out_input;
586 }
587 /* initialize backlight */
588 memset(&props, 0, sizeof(struct backlight_properties));
589 props.type = BACKLIGHT_PLATFORM;
590 props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
591 pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
592 &pcc_backlight_ops, &props);
593 if (IS_ERR(pcc->backlight)) {
594 result = PTR_ERR(pcc->backlight);
595 goto out_input;
596 }
597
598 /* read the initial brightness setting from the hardware */
599 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
600
601 /* read the initial sticky key mode from the hardware */
602 pcc->sticky_mode = pcc->sinf[SINF_STICKY_KEY];
603
604 /* add sysfs attributes */
605 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
606 if (result)
607 goto out_backlight;
608
609 return 0;
610
611out_backlight:
612 backlight_device_unregister(pcc->backlight);
613out_input:
614 input_unregister_device(pcc->input_dev);
615out_sinf:
616 kfree(pcc->sinf);
617out_hotkey:
618 kfree(pcc);
619
620 return result;
621}
622
623static int acpi_pcc_hotkey_remove(struct acpi_device *device)
624{
625 struct pcc_acpi *pcc = acpi_driver_data(device);
626
627 if (!device || !pcc)
628 return -EINVAL;
629
630 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
631
632 backlight_device_unregister(pcc->backlight);
633
634 input_unregister_device(pcc->input_dev);
635
636 kfree(pcc->sinf);
637 kfree(pcc);
638
639 return 0;
640}
641
642module_acpi_driver(acpi_pcc_driver);